题目
- 题目
Table: Patients
+--------------+---------+
| Column Name | Type |
+--------------+---------+
| patient_id | int |
| patient_name | varchar |
| conditions | varchar |
+--------------+---------+
patient_id is the primary key for this table.
'conditions' contains 0 or more code separated by spaces.
This table contains information of the patients in the hospital.
Write an SQL query to report the patient_id, patient_name all conditions of patients who have Type I Diabetes. Type I Diabetes always starts with DIAB1 prefix
Return the result table in any order.
The query result format is in the following example.
Patients
+------------+--------------+--------------+
| patient_id | patient_name | conditions |
+------------+--------------+--------------+
| 1 | Daniel | YFEV COUGH |
| 2 | Alice | |
| 3 | Bob | DIAB100 MYOP |
| 4 | George | ACNE DIAB100 |
| 5 | Alain | DIAB201 |
+------------+--------------+--------------+
Result table:
+------------+--------------+--------------+
| patient_id | patient_name | conditions |
+------------+--------------+--------------+
| 3 | Bob | DIAB100 MYOP |
| 4 | George | ACNE DIAB100 |
+------------+--------------+--------------+
Bob and George both have a condition that starts with DIAB1.
解答
like 语句
/*
功能：字符型字段进行部分匹配查询 一般和通配符搭配使用
常见的通配符：
_ 任意单个字符
% 任意多个字符 支持0-多个
not like
*/
查询以报告I型糖尿病患者的所有情况的Patient_id，Patient_name。 I型糖尿病始终以DIAB1前缀开头
用 like '%DIAB1%' 即可
select *
from Patients
where conditions like "%DIAB1%"